CVE-2026-100782
Received Received - Intake

Privilege Escalation in Firefox Due to Boundary Condition Error

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: Mozilla Corporation

Description
Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

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Meta Information

Published
2026-09-29
Last Modified
2026-09-29
Generated
2026-09-29
AI Q&A
2026-09-29
EPSS Evaluated
N/A
NVD
CVE-2026-100782
EUVD
EUVD-2026-88934

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox 153.4
mozilla firefox 157
mozilla firefox 115.42
mozilla firefox 140.17

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

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Executive Summary

This is a privilege escalation vulnerability caused by incorrect boundary conditions in the Graphics component of Firefox. It allows attackers to gain elevated privileges through improper handling of certain inputs.

Impact Analysis

An attacker could exploit this to gain unauthorized access to sensitive data or execute arbitrary code on your system. This could lead to data theft, system compromise, or further network intrusions if combined with other vulnerabilities.

Mitigation Strategies

Update Firefox to a patched version: Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, or Firefox ESR 140.17 or later. This vulnerability was fixed in these releases.

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